Airdrop hunting means using crypto protocols that have no token yet, so that your wallet qualifies if the project later gives free tokens to early users. You don't buy anything from the project. You pay with your time, transaction fees and sometimes capital you lock up. Nothing guarantees an allocation. Most projects publish their eligibility rules only after they have taken a snapshot of on-chain activity, and DappRadar data shows that most airdropped tokens lose value within months.
How an airdrop works
The basic tool is the snapshot: a record of the blockchain's state at a specific block. The project then checks which wallets met its criteria before that block, assigns allocations and opens a claim window.
Arbitrum's 2023 distribution is one of the best-documented examples, because the Arbitrum Foundation published the full rules:
- Snapshot: block 58642080 on Arbitrum One, 6 February 2023.
- Points system: wallets earned points for actions such as bridging funds, transacting across multiple months, transaction count or distinct contract interactions, and aggregate transaction value. Scores were capped at 15, and a wallet needed at least 3 points to receive tokens.
- Allocations: from 625 to 10,250 ARB per wallet, out of a user allocation of 1.162 billion tokens (11.62% of initial supply).
- Sybil deductions: wallets lost a point if all their transactions happened within 48 hours, or if they held under 0.005 ETH and had touched no more than one contract. Addresses flagged as Sybils in an earlier bounty programme run by another protocol were disqualified.
- Claim window: 23 March to 24 September 2023. Unclaimed tokens can no longer be claimed.
The rules show three things a hunter is up against. Criteria are applied retroactively. Activity spread over time counts for more than a single burst. A missed claim deadline can wipe out an allocation.
Common types of airdrop
- Retroactive: rewards past usage measured at a snapshot, as Arbitrum did.
- Points programmes: the project awards off-chain points for on-chain actions and later converts them to tokens. A points programme signals intent, but it is not a promise of a token or of any conversion rate.
- Holder airdrops: go to wallets that hold a particular asset at the snapshot.
- Testnet participation: some projects have rewarded people who tested pre-launch networks. According to ethereum.org, testnet ETH "is supposed to have no real value", and it is usually free from faucets. Testnet activity therefore costs little money, but many testnets never lead to a token.
What airdrop hunting actually costs
- Fees: every qualifying transaction costs gas. On low-fee networks this can be small, but fees add up across many protocols and wallets.
- Capital: criteria increasingly weigh transaction value and deposits, as Arbitrum's "aggregate transaction value" did, so larger balances tend to earn larger allocations. Capital deposited in a protocol carries smart contract risk.
- Time: you have to research projects, return to them over weeks or months, and track claim windows.
- Price risk after the claim: in a report dated 18 September 2025, DappRadar analyst Sara Gherghelas found that 88% of airdropped tokens lost value within three months. The data covered airdrops since 2017, worth over $20 billion in total (reported by Cointelegraph, 20 October 2025).
Sybil filters: why multi-wallet farming backfires
A Sybil is one person posing as many users, usually by spreading activity across several wallets. Projects filter for this before distribution.
In May 2024 LayerZero Labs gave suspected Sybils 14 days to self-report in exchange for 15% of their intended allocation. The deadline was 17 May (The Block, 3 May 2024). Co-founder Bryan Pellegrino later said up to 100,000 addresses had self-reported (The Block, 14 May 2024). LayerZero then published a preliminary public list of about 800,000 potential Sybil addresses (The Defiant).
What a filter looks for varies by project. Arbitrum's rules penalised activity crammed into 48 hours and near-empty wallets that touched a single contract. Using a protocol the way it is meant to be used is the only approach that doesn't depend on getting past a filter.
Is this airdrop claim safe to sign?
Answer each question about the claim page in front of you to see which warning sign from the article applies, if any.
Did a token or NFT you never asked for turn up in your wallet and point you to a claim site?
- Yes → Matches the fake-airdrop pattern
- No, I found the claim through the project itself → next question
Does the site, a support agent or anyone else ask for your recovery phrase or private key?
- Yes → Stop: never share these
- No → next question
Are you asked to send crypto first to unlock the airdrop?
- Yes → Red flag: paying to claim
- No → next question
Have you checked the domain in the address bar yourself, rather than trusting a link or its preview?
- No, I clicked through from a link → Check the domain before signing
- Yes, it is the project's real domain → next question
Does the transaction you are asked to sign request an unlimited token approval?
- Yes → Avoid unlimited approvals
- No, or I can limit the amount → next question
Are you claiming from a dedicated hunting wallet that holds only what this interaction needs?
- No, it is my main wallet with my savings → Separate hunting from savings
- Yes → No warning sign from this list
ethereum.org describes this pattern: an unsolicited token or NFT lures you to a fake claim site, where you are asked to sign a transaction that hands over your funds. Do not follow the token's link.
According to ethereum.org, no legitimate service, support agent or website will ever ask for your recovery phrase or private key.
A request to send crypto first in order to unlock an airdrop is a red flag. A genuine claim does not ask for this.
Link previews can be spoofed. Check the domain yourself every time, especially after clicking a link, before you connect a wallet or sign anything.
Approvals have no expiry date and survive disconnecting your wallet. Avoid unlimited ones, and revoke old ones through a block explorer or a revoke tool. Revoking costs a transaction fee.
A dedicated wallet holding only what each interaction needs limits the damage if the contract turns out to be malicious.
None of the article's warning signs applies to your answers. Before you sign, check the claim deadline, and record the date and market value of the tokens you receive for tax purposes.
This checks only the warning signs the article lists: it cannot verify a contract, a project or an allocation, and passing it does not make a claim safe or worth anything.
Fake airdrops and wallet safety
Scammers use the airdrop format directly. ethereum.org describes the pattern: a scam project sends a token or NFT to your wallet to lure you to a fake claim site. There you are asked to sign a transaction that hands over your funds.
Practical rules, from ethereum.org's security guidance:
- Never share a recovery phrase or private key. "No legitimate service, support agent, or website will ever ask you for these."
- Never pay to claim. A request to send crypto first in order to "unlock" an airdrop is a red flag.
- Check the domain every time, especially after clicking a link. Link previews can be spoofed.
- Avoid unlimited token approvals, and revoke old ones. Approvals have no expiry date and survive disconnecting your wallet. You can revoke them with block explorers and tools such as Revoke.cash. Each revocation costs a transaction fee.
- Keep hunting separate from savings. A dedicated wallet holding only what each interaction needs limits the damage from a malicious contract.
For scale: the FBI's 2025 Internet Crime Report recorded $11.37 billion in cryptocurrency-related losses from 181,565 complaints in the US, up about 22% on 2024 (The Block, April 2026). The figure covers all crypto fraud, not only airdrop scams.
Taxes on airdropped tokens
Treatment differs by country. Two examples:
- United States: the IRS says that if you receive new cryptocurrency from an airdrop that follows a hard fork, you have ordinary income equal to its fair market value when you receive it, provided you have dominion and control over it. Your basis equals the amount included in income (IRS virtual currency FAQ, Q23 to Q25). This IRS guidance covers airdrops that follow a hard fork.
- United Kingdom: HMRC says Income Tax "will not always apply" to airdropped tokens received in a personal capacity without doing anything in return. Airdrops received for a service, or in expectation of one, are taxed as income. Disposing of an airdropped token may create a chargeable gain for Capital Gains Tax even if no Income Tax was due on receipt (HMRC Cryptoassets Manual, CRYPTO21250).
Keep a record of the date and market value of every token you receive and of every later sale.
Airdrop hunting vs airdrop farming
The terms overlap. "Hunting" usually means finding and qualifying for distributions. "Farming" usually means systematic, high-volume activity aimed at maximising allocations, often across many wallets. Sybil filters target exactly that kind of multi-wallet activity.
